SOLUTION: Solve using the square root property 4x^2 - 81=

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Question 371389: Solve using the square root property
4x^2 - 81=
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

solve using the square root property 

4x^2 - 81= 0

4x^2 = 81

=sqrt%28%284x%5E2%29%29+=+sqrt%2881%29

2x = +- 9

x = 9/2

x = -9/2